spirogyra

Any of various filamentous freshwater green algae of the genus Spirogyra, having chloroplasts in spirally twisted bands.

A genus of fresh-water algæ, of the class Conjugatæ and order Zygnemaceæ.

Any of a group of freshwater, filamentous green algae, of the genus Spirogyra, having chloroplasts arranged in spirals.

freshwater algae consisting of minute filaments containing spiral chlorophyll bands